Steel-wood composite structure joint construction method

Abstract

The invention discloses a steel-wood composite structure joint construction method, which belongs to the technical field of laminated wood bar planting, and comprises the following steps: forming a plurality of bar planting holes in a wood arched beam in a finish machining manner in a factory; after the reinforcing steel bars are pretreated, steel limiting pins are welded to the two ends of the reinforcing steel bars; glue is injected into the glue injection holes in the two sides of the steel bar planting hole at the same time, the wood arched girders are tightly jacked towards the inner side after glue injection is completed, pressing force is provided, and it is guaranteed that the multiple wood arched girders are tightly connected. By means of the mode, the steel-wood joints are fixed through the temporary pin shafts, the number of the pin shafts is half of the total number of the bolt holes, the bolt holes are adopted for positioning, the joints are fixed after all the bolt holes are aligned, and the joint installation precision is guaranteed; staggered trepanning at different heights is carried out on the cross section of the wood arched beam, so that weakening of trepanning on the wood cross section is reduced; steel limiters are welded to the ends of the steel bar beams to ensure that the steel bars are located in the centers of the steel bar planting holes, and uniform flowing of steel bar planting glue in the hole channels is kept while the steel bar planting hole channels are not blocked.

Description

Technical Field

[0001] The invention relates to the technical field of glued-laminated timber reinforcement, and in particular to a steel-wood hybrid structure node construction method. Background Art

[0002] Currently, the main methods for installing steel-timber joints in large-span steel-timber tensioned steel-string hybrid structures include mechanical connections such as bolts, rivets, and steel clamping; glued connections; and embedded connections. Timber structure rebar joints include single rebar, multiple rebar, and circular or radial rebar connections.

[0003] For example, Chinese patent CN110295670B discloses a square FRP steel-wood composite node and its installation method. All components of the node can be processed and mass-produced in the factory, and the construction site only uses bolt connections and sleeve radially extruded steel bars for mechanical connection.

[0004] However, when installing steel-wood nodes in large-span steel-wood hybrid structures, mechanical connection methods need to prevent wood cracking caused by drilling; gluing connection methods have high requirements for wood surface treatment; and embedded connection methods have high requirements for installation accuracy. Regarding the connection method of the rebar nodes of wooden arch beams, the node strength of a single rebar connection is insufficient and the node needs to be reinforced; the connection with multiple rebars will weaken the strength of the wooden arch section too much, and too many rebars are not conducive to node installation; the circular or radial rebar connection has high requirements for drilling accuracy and cross interference of steel bars should be avoided.

[0005] Based on this, the present invention designs a steel-wood hybrid structure node construction method to solve the above problems. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the prior art, the present invention provides a steel-wood hybrid structure node construction method.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A steel-wood hybrid structure node construction method, including a wood arch reinforced joint construction method and a steel-wood joint construction method; The construction method of the wooden arch reinforced joint includes the following steps: Step 1: Use fine processing in the factory to open multiple rebar holes on the wooden arch beam; Step 2: Pre-treat the steel bars to ensure good bonding between the colloid and the steel bar surface; then weld steel limit pins at both ends of the steel bar to ensure that the steel bar is located in the center of the planting hole; Step 3: Inject glue into the injection holes on both sides of the rebar hole at the same time. Stop injecting glue when glue comes out of the glue outlet holes on both sides. Use a wooden plug to block and fix the glue outlet hole on one side. Continue injecting glue into the injection holes on this side until glue overflows from the glue outlet hole on the opposite side again. Then, block all the injection holes and glue outlet holes. Step 4: Push the wooden arch beam inward to provide compression force and ensure that multiple wooden arch beams are tightly connected.

[0008] Furthermore, the positions of the anchor holes on the cross section of the wooden arch beam are staggered.

[0009] Furthermore, the steel bars are pre-treated in the following ways: using an angle grinder and a matching bowl-shaped wire wheel to remove rust and clean the steel bar surface; and using sandpaper to roughen the steel bar surface.

[0010] Furthermore, steel limit pins are welded at both ends of the steel bar to ensure that the steel bar is located in the center of the anchor hole.

[0011] Furthermore, the stop pins are welded using carbon dioxide gas shielded welding.

[0012] Furthermore, after the glue injection is completed, the rebar nodes should be left still for 24 hours.

[0013] Furthermore, the construction method of the wooden arch beam steel-wood node includes the following steps: Step 1: Use precision machining to open bolt holes at the connection points of steel beams, steel plates and wooden arch beams in the factory; Step 2: The steel beams, steel plates and wooden arch beams are positioned through the bolt holes and verified using measuring instruments; after all the bolt holes are aligned, pins are inserted into the bolt holes to secure the steel-wood nodes; Step 3: After the installation and measurement of the wooden arch beam is completed, install and tighten all the bolts.

[0014] Furthermore, the number of pins is half of the total number of bolt holes.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. During the hoisting construction of large-span wooden arch beams, the wooden beams and steel-wood connection nodes are installed along the hoisting direction; temporary pins are used to fix the steel-wood nodes, and the number of pins is half of the total number of bolt holes. The steel-wood nodes are positioned by the wooden arch beam bolts and the bolt holes are used for positioning. After all the bolt holes are aligned, the nodes are fixed to ensure the accuracy of the node installation. 2. Stagger holes at different heights on the cross-section of the wooden arch beam to reduce the weakening of the wooden cross-section caused by the holes; weld steel limiters at the ends of the steel beams to ensure that the steel bars are located in the center of the rebar holes, while maintaining uniform flow of the rebar glue in the holes without blocking the rebar holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0017] Figure 1 Schematic diagram of rebar nodes and steel-wood nodes and their installation structures; Figure 2 This is the front view of the rebar node; Figure 3 This is the side view of the rebar node; Figure 4 It is the top view of the rebar node; Figure 5 This is the front view of the steel-wood joint; Figure 6 This is the side view of the steel-wood node; Figure 7 This is a top view of the steel-wood node.

[0018] The numbers in the figure represent: 1. Wooden arch beam; 11. Rebar hole; 2. Rebar; 4. Steel plate; 5. Bolt; 6. Steel beam; 7. Pin; 8. Steel-wood node; 9. Rebar node. DETAILED DESCRIPTION

[0019] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0020] The terms “left,” “right,” “front,” “back,” “up,” and “down” mentioned in the following description are oriented in the viewing direction of the front view.

[0021] Example 1: In some embodiments, please refer to the accompanying drawings of the specification. Figure 1-Figure 4 , a steel-wood hybrid structure node construction method, including a wood arch rebar node 9 construction method and a steel-wood node 8 construction method; The construction method of the wooden arch reinforcement node 9 comprises the following steps: Step 1: A plurality of rebar holes 11 are opened on the wooden arch beam 1 by fine processing in the factory; The diameter error of the anchor hole 11 is less than 1mm. It is strictly forbidden to drill holes on site or manually. The positions of the anchor holes 11 on the cross section of the wooden arch beam 1 are staggered, so that the steel bars 2 can be staggered, effectively reducing the weakening of the cross section.

[0022] Step 2: Pre-treat the steel bar 2 to ensure good bonding between the colloid and the surface of the steel bar 2; then weld steel limit pins at both ends of the steel bar 2 to ensure that the steel bar 2 is located in the center of the planting hole 11; The pretreatment method of the steel bar 2 is: use an angle grinder and a matching bowl-shaped wire wheel to remove rust and clean the surface of the steel bar 2; and use sandpaper to roughen the surface of the steel bar 2 to ensure good adhesion between the colloid and the surface of the steel bar 2; Steel limit pins are welded at both ends of the steel bar 2 to ensure that the steel bar 2 is located at the center of the anchor hole 11, and the anchor glue is ensured to flow evenly and freely without blocking the anchor hole 11.

[0023] The limit pins are welded using carbon dioxide gas shielded welding to avoid damage to the steel bar 2.

[0024] Step 3: Inject glue into the glue injection holes on both sides of the rebar planting hole 11 at the same time. Stop injecting glue when glue comes out of the glue outlet holes on both sides. Block and fix the glue outlet hole on one side with a wooden plug. Continue injecting glue into the glue injection holes on this side until glue overflows from the glue outlet hole on the opposite side again. Then, block all the glue injection holes and glue outlet holes. Step 4: Push the wooden arch beam 1 inward to provide a pressing force to ensure that the multiple wooden arch beams 1 are tightly connected.

[0025] After the glue injection of the rebar node 9 is completed, it should be left still for 24 hours to prevent quality defects in the glue injection of the rebar node 9 and to ensure that the wooden arch beams 1 are tightly connected and seamless when the rebar node 9 of the wooden arch beam 1 is spliced, and there is no misalignment between the wooden arch beams 1.

[0026] Example 2: In some embodiments, please refer to the accompanying drawings of the specification. Figure 1 and Figure 5-Figure 7 The construction method of steel-wood node 8 includes the following steps: Step 1: Use fine processing to open bolt holes at the connection position of the steel beam 6, steel plate 4 and wooden arch beam 1 in the factory; The connection position between the wooden arch beam 1 and the steel beam 6 is finely drilled in the factory, and the hole diameter error is less than 1mm. On-site or manual drilling is strictly prohibited.

[0027] Step 2: The steel beam 6, steel plate 4 and wooden arch beam 1 are positioned through the bolt holes and checked using a measuring instrument; after all the bolt holes are aligned, the pins 7 are inserted into the bolt holes to fix the steel-wood node 8; The number of pins 7 is half of the total number of bolt holes; Step 3: After the installation and measurement of the wooden arch beam 1 are completed, install and tighten all the bolts 5.

[0028] The steel-wood node 8 is positioned through bolt holes, and the node is fixed after all bolt holes are aligned, ensuring the accuracy of node installation.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A steel-wood hybrid structure node construction method, characterized by: Including the construction method of wooden arch reinforced joint (9) and the construction method of steel-wood joint (8); The construction method of the wooden arch reinforced joint (9) comprises the following steps: Step 1: A plurality of rebar holes (11) are opened on the wooden arch beam (1) by fine processing in the factory; Step 2: Pre-treat the steel bar (2) to ensure good bonding between the colloid and the surface of the steel bar (2); then weld steel limit pins at both ends of the steel bar (2) to ensure that the steel bar (2) is located at the center of the anchor hole (11); Step 3: Inject glue into the glue injection holes on both sides of the rebar planting hole (11) at the same time. Stop injecting glue when glue comes out of both glue outlet holes. Use a wooden plug to block and fix the glue outlet hole on one side. Continue injecting glue into the glue injection holes on this side until glue comes out of the glue outlet hole on the opposite side again. Then, block all the glue injection holes and glue outlet holes. Step 4: Push the wooden arch beam (1) inwards to provide a pressing force and ensure that the multiple wooden arch beams (1) are tightly connected.

2. The steel-wood hybrid structure node construction method according to claim 1, characterized in that: The positions of the anchor holes (11) on the cross section of the wooden arch beam (1) are staggered.

3. The steel-wood hybrid structure node construction method according to claim 1, characterized in that: The steel bar (2) is pre-treated by using an angle grinder and a matching bowl-shaped wire wheel to remove rust and clean the surface of the steel bar (2); and using sandpaper to roughen the surface of the steel bar (2).

4. The steel-wood hybrid structure node construction method according to claim 1, characterized in that: Steel limit pins are welded at both ends of the steel bar (2) to ensure that the steel bar (2) is located at the center of the anchor hole (11).

5. The steel-wood hybrid structure node construction method according to claim 1, characterized in that: The limit pin is welded using carbon dioxide gas shielded welding.

6. The steel-wood hybrid structure node construction method according to claim 1, characterized in that: After the glue injection is completed, the rebar node (9) should be left still for 24 hours.

7. The steel-wood hybrid structure node construction method according to claim 1, characterized in that: The construction method of the steel-wood node (8) includes the following steps: Step 1: The bolt holes are opened in the factory by fine processing at the connection position of the steel beam (6), the steel plate (4) and the wooden arch beam (1); Step 2: The steel beam (6), steel plate 4 and wooden arch beam (1) are positioned through the bolt holes and checked using a measuring instrument; after all the bolt holes are aligned, the pins (7) are inserted into the bolt holes to fix the steel-wood node (8); Step 3: After the installation and measurement of the wooden arch beam (1) are completed, install and tighten all the bolts (5).

8. The steel-wood hybrid structure node construction method according to claim 7, characterized in that: The number of pins (7) is half of the total number of bolt holes.

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